#1 Program does not compile

[Anonymous]

I am trying to compile the program microcalc on my machine (under eclipse) but it doesn't want to.
It gives me too many errors. Here are some examples

Bfunc.INDEX_STR_CAT cannot be resolved Startup.java line 231

canvasHandler cannot be resolved Bfunc.java line 620

Is there any idea how can I solve these problems.